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author | Brad Hill <hillbrad@gmail.com> | 2016-04-07 15:38:00 -0700 |
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committer | James M Snell <jasnell@gmail.com> | 2016-04-08 09:24:57 -0700 |
commit | 945454894bf191e3d1753647fa2d574f4692f5e3 (patch) | |
tree | fa709ffec796be3656842c9c715f0bcb4427eba2 /doc | |
parent | 7c9a691ee7d13ccf1c883e27fdb96eccc8b73d5e (diff) | |
download | android-node-v8-945454894bf191e3d1753647fa2d574f4692f5e3.tar.gz android-node-v8-945454894bf191e3d1753647fa2d574f4692f5e3.tar.bz2 android-node-v8-945454894bf191e3d1753647fa2d574f4692f5e3.zip |
doc: add example using algorithms not directly exposed
PR-URL: https://github.com/nodejs/node/pull/6108
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/api/crypto.markdown | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown index 6c45d17951..6ec19ea41d 100644 --- a/doc/api/crypto.markdown +++ b/doc/api/crypto.markdown @@ -734,6 +734,28 @@ console.log(sign.sign(private_key, 'hex')); // Prints the calculated signature ``` +A [`sign`][] instance can also be created by just passing in the digest +algorithm name, in which case OpenSSL will infer the full signature algorithm +from the type of the PEM-formatted private key, including algorithms that +do not have directly exposed name constants, e.g. 'ecdsa-with-SHA256'. + +Example: signing using ECDSA with SHA256 + +```js +const crypto = require('crypto'); +const sign = crypto.createSign('sha256'); + +sign.update('some data to sign'); + +const private_key = '-----BEGIN EC PRIVATE KEY-----\n' + + 'MHcCAQEEIF+jnWY1D5kbVYDNvxxo/Y+ku2uJPDwS0r/VuPZQrjjVoAoGCCqGSM49\n' + + 'AwEHoUQDQgAEurOxfSxmqIRYzJVagdZfMMSjRNNhB8i3mXyIMq704m2m52FdfKZ2\n' + + 'pQhByd5eyj3lgZ7m7jbchtdgyOF8Io/1ng==\n' + + '-----END EC PRIVATE KEY-----\n'; + +console.log(sign.sign(private_key).toString('hex')); +``` + ### sign.sign(private_key[, output_format]) Calculates the signature on all the data passed through using either |